Air-pump.



J. J. McINTYRE AIR PUMP.

APPLICATION FILED FEB. 28, 1911.

Patented Aug". 29, 1911.

v providing compressed air which may be JOHN J. McINTY R-E, 0F HARTFORD, CONNECTICUT.

AIR-PUMP,

Specification of Letters Patent.

Patented nag. 29,1911.

Application filed February 28, 1911. Serial No. 611,483.

To all whom it may concern:

Be it. known that I, JonN J. MCINTYRE, a

citizen of the United "States, residing at. Hartford, inthe county of Hartford and State of Connecticut, have invented a new and useful'lmproveinent 1n Air-Pumps, of

which the following is a specification.

This invention relates to an air pump which is particularly designed to be attached to the chassis of a motor Vehicle for used for operating a motor. starting apparatus, orthe steering mechanism, or brakes, or for the inflation of tires and blowing of a whistle or horn,but, of course, the pump may be used in other places. The chass s frames of the many styles of autbmobiles in common use, vary much in design and con-.

' struction, andthe available space for attach ing an independent pumping device is ery limited.

' The object of this invention is to provide a verylight, simpleand eflicient pump, having few parts, whichis provided with a support so designed that it may be conveniently attached to a framebar,'or other part of the chassis, or to a piece attached thereto, and readily setin the necessary relation to the; motor mechanism which it is desired to employ for driving it. The pumpshown is especially designed so that it may be attached to nearly every car in common use, and be driven from the cam shaft 01" magnetoshaft of the engine.

Figure 1 of the accompanying drawings shows a sideelei-ation, with parts in central section, of.a pump which embodiesthis invention; Fig. 2 shows a front view of the pump. Fig. 3 shows a plan of thesaine. Fig. 4 shows a longitudinal, section of a cylinder and piston of modified form.

The supporting bracket has a base 1., which is designed tobe clamped or bolted to a'convenie'nt part of the chassis, or to. a piece attached thereto, in proximity to the motor. A. cylinder-carrying yoke 2 is ad-- justably secured to the-face of the upright 3 of the supporting-bracket, by means of a nut lthat turns on the bolt 5 which extends. through the yoke and the slot 6 in the upright.

The cylinder 7 has flanges 8 that are fastened by screws 9 to the edges ofthe yoke.

Movable in the cylinder is a double acting piston 10. This piston has a stud 11.projecting laterally from the'middle, through a.

slot 12 in the back wall of the cylinder. in .the front wall of the cylinder is a passage 3, and opening from-this passage through the nipple 1 1 is the discharge outlet. At the upper and lower ends ofthe cylinder and communicating with the passage 13 are ports 15, controlled by valves 16 normally held closed by springs 17 that are seated in the screw plugs 18; Through the side walls of the cylinder, above and below the middle, are-perfmations 19 which form the intake ports. One end of the cylinder is closed by head 21, on which is a bearing 22. T urning in this bearing is a shaft 23, attached to one end of which is a crank 2a. A rod 25 connects this crank with the stud that projects laterally from the middle of thepiston through the rear wall of the cylinder. Splined upon the shaft may be a pulley or gear. If it is desired to have the pump driven from a gear on the magneto or cam shaft-ofthe motor, the driving member that is splined upon the pump shaft may be a gear 26 as is shown in the drawings. This gear may be held, place by any suitable means, desirably a spring pin 27.

v In some cases, more especially in larger sizes-of the pump, it maybe desirable to place valves 28 in the ends of the piston, as is illustrated in Fig. 4. With this constructhrough the wall of the piston in such position that it always communicates.with the intake port 30 through the side of the cylin der.

I This pump may be located adjacent to the motor so that it will gear withthe desired drivingpart, and then the supporting bracket may be turned at the necessary angle and drawn along the yoke the requireddistanco until the base of the bracket is in position to be fastened to the most convenient part of the chassis. After the pump has been located so as to properly gear with the driving part, and the supporting bracket has been secured in place, thc'nut 4 may be turned on the bolt 5 so as toclamp the yoke and the upright of the bracket together.

of the active mechanism, may be turned .around on the bolt and clamped at any angle, with'relation to the upright of the bracket, within an entire circle, and it may within the limits of the slot therein through be moved longitudinallyalong the upright a head 20 andthe other end is closed by a tion an elongated opening 29 may bemadc The yoke which carriesthe'cylinder and all stud back and forth in the open slot.

When the parts are secured in position,

and the gears are. in driving engagement, the rotation of the crank shaft, through the connecting rod and stud, reciprocates the piston in the cylinder and forces the air firstfrom one end and then the other end of the cylinder through the discharge passage. \Vith the construction described, the connecting rod and crank are shielded by the bracket land the yoke. There are few parts to this pump and the action is easy, for the piston is reciprocated by moving the piston Frietion is'reduced to a minimum, as no packing is required, for it is not necessary that the piston stud fit tightly in the slot inthe cylinder wall.

The invention claimed is:

1. An air pump having a supporting bracket, acylinder rotarily supported by the bracket and adjustable longitudinally thereof, a piston movable in the cylinder, a

stud extending transversely from the piston through a slot in the wall of the cylinder, a crank shaft and crank, and a rod connecting the crank and said piston stud.

2. An air pump having a supporting bracket, a yoke movable along and rotatable on the bracket, a cylinder secured to the yoke, a piston movable in'the cylinder, a stud extending transversely from the middle of the piston through a slot in the wall of the cylinder, heads for the cylinder, a bear ing attached to one of the heads, a shaft supported by said bearing, a crank on the shaft, and a rod connecting the crank and the stud projecting from the piston.

An air pump having a cylinder, a piston movable in the cylinder, a stud extending transversely from the piston, a shaft,

a crank on the shaft, a rod connecting the crank and the stud extending from the piston, a yoke secured to the back of the cylinder, and a. supporting bracket longitudinally adjustable along the yoke.

4t. Anair pump having a cylinder, a pis I ton movable in the cylinder, a stud extending transversely from the piston through the back'of the cylinder, a shaft-supported by the cylinder, a crank on the shaft, a rod connecting the crank and the stud extending from the piston, a yoke-carrying-the cylinder, and a supporting bracket secured-to the yoke and rotarily and longitudinally adjustable With relation thereto.

An air pump having a cylinder, a piston movable in the cylinder, a stud extending transversely from the piston, a bearing attached to the cylinder, a'shaft held by the bearing, a gear on the shaft at one side of the bearing, a crank on the shaft at the other side of the bearing, arod connecting the crank and the stud extending from the piston, a yoke secured to the cylinder, a slotted supporting bracket, a bolt extending through the yoke and the slot in the bracket, and a nut turning on said bolt for securing the yoke and bracket together.

6. An air pump haying a. cylinder with of the cylinder, heads at the ends of the cy linder, a bearing secured to one of said heads, a shaft supported bysai'd bearing, a crank on the shaft, a rod back of the cylinder and connecting the crank and the stud extending from the piston, a yoke secured to the back of the-cylinder, and a'supporting bracket rotarily and longitudinally adjust.

ably attached to said yoke. J

7. An air pump having a cylinder, a piston movable in the cylinder, a-shaft, a crank on the shaft, means connecting the crank and the piston, ayoke carrying the cylinder, shaft, crank and connecting means, and a supporting bracket rotarily connected with and, longitudinally adjustable along thev yoke.

'JOHN J. MOINTYRE. Witnesses JOSEPHINE M. STR MPFER, f

' HARRY R. WILLIAMS. 

